Display element drive circuit and display apparatus
a drive circuit and display element technology, applied in the direction of instruments, semiconductor devices, computing, etc., can solve the problems of deterioration of display image quality, large dcp of the display element drive circuit, and irregular operation characteristics, so as to suppress the occurrence of delay of write operation, improve display image quality, and improve display image quality
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first embodiment
[0164]FIG. 8 is a circuit configuration view showing the display element drive circuit according to the present invention. FIGS. 9A and 9B are schematic structural views showing a structural example of an element configuration of a thin film transistor applied to the display element drive circuit according to this embodiment.
[0165]In FIG. 8, like reference numerals denote circuit configurations equivalent to those in the display element drive circuit, thereby simplifying the explanation. Moreover, in FIGS. 9A and 9B, hatching is provided to a drain electrode, a data line and a source electrode in order to clarify the drawings for the convenience's sake.
[0166]As shown in FIG. 8, in a circuit configuration equivalent to the display element drive circuit DC depicted in FIG. 3, a display element drive circuit DCA according to this embodiment has a structure in which, of parasitic capacitances formed in a write control thin film transistor Tr12 in which one end side (a drain electrode si...
second embodiment
[0201]FIG. 13 is a circuit configuration view showing the display element drive circuit according to the present invention.
[0202]FIG. 14 is a characteristic view showing a relationship between a parasitic capacitance of a light emission control thin film transistor and an output current (a driving current) with respect to a write current (a gradation signal current).
[0203]Here, like reference numerals denote circuit configurations equal to those in the first embodiment, thereby simplifying the explanation.
[0204]As shown in FIG. 13, in the same circuit configuration as the display element drive circuit DC depicted in FIG. 3, a display element drive circuit DCB according to this embodiment has a structure in which, of parasitic capacitances formed in a light emission control thin film transistor or third transistor Tr13 in which one end side of a current path (a source electrode side) is connected with an organic EL element (a display element) OEL and one end side (a contact point N12...
third embodiment
[0215]FIG. 15 is a circuit configuration view showing the display element drive circuit according to the present invention.
[0216]Here, like reference numerals denote the same circuit configurations as those in the foregoing embodiments, thereby simplifying the explanation.
[0217]As shown in FIG. 15, in the same circuit configuration as the display element drive circuit DC depicted in FIG. 3, a display element drive circuit DCC according to this embodiment has a structure in which, of parasitic capacitances formed in a write control thin film transistor or first transistor Tr11 in which one end side of a current path (a source electrode side) is connected with a gate terminal (a contact point N11) of a third thin film transistor Tr13, the other end side (a drain electrode side) is connected with a power supply line VL and a control terminal (a gate electrode) is connected with a scanning line SL, a parasitic capacitance Cgd1 between a gate and a drain is set to be larger than a parasi...
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